docs: Add Since for GtkCellRendererPixbuf:surface

diff --git a/gtk/gtkcellrendererpixbuf.c b/gtk/gtkcellrendererpixbuf.c
index 15e4a0d6e5e9b15ecee1f1b4895b608c0d2a8222..54acb1a5b6bbaa8edfd4539b6a784cd58a3e54da 100644 (file)
--- a/gtk/gtkcellrendererpixbuf.c
+++ b/gtk/gtkcellrendererpixbuf.c
@@ -168,6 +168,11 @@ gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class)
                                                        P_("Pixbuf for closed expander"),
                                                        GDK_TYPE_PIXBUF,
                                                        GTK_PARAM_READWRITE));
+  /**
+   * GtkCellRendererPixbuf:surface:
+   *
+   * Since: 3.10
+   */
   g_object_class_install_property (object_class,
                                   PROP_SURFACE,
                                   g_param_spec_boxed ("surface",